Did yours have that problem from the start or did it appear later? Mine was fine for over a year but then suddenly didnt get recognized in handheld mode anymore only via WiFi. That problem fixed itself but since then my right control stick has a tendency to go right by itself. Its only the right joy con that has issues for me though. Left one is fine.

I don't blame Nintendo for that though, as my Switch travels a lot with me every week and I dont use a case for transport.

I've had it since launch but the issues only started a month ago. For me it'll occasionally go up when I'm not touching it. It's messed me up in Splatoon a few times. Also, yeah, it only happens with the right Joy-Con for me as well, left one seems fine.

I've had it since a month after launch, and about a month ago, the left one would go up when I wasn't touching it. Really messes me up in dialogue selection, and screwed me when sneaking in Skyrim. The right one has started to go too now, but not as bad, and now in all my games if I'm not careful I find the camera pointed at the ground. I think the analog sticks are just really cheap or something.

"AlphaDream - best known for its work on the Mario & Luigi game series over the years - appears to have recently updated its official website. In the recruitment section, there are job applications referencing the Nintendo Switch, along with game development for smartphones and also the PlayStation 4. The developer looks to be seeking 2D and 3D graphic designers to work on future projects.

...

During a Nintendo Direct earlier this year, it was revealed a 3DS port of AlphaDream's Mario & Luigi: Bowser's Inside Storywould be released in 2019 - featuring updated graphics and adding a new game called Bowser Jr’s Journey."

As much as I love the Switch, I've been saying that it's basically the NES of the modern era. You can tell a lot of thought went into its making but some bits and pieces of the design of the system and the Joy-Cons are very flimsy.

The sad part about the Joy-Cons is that the entire clicking mechanism to secure them into the rail relies on a tiny little plastic tab connected to the button on the back. If that should so much as chip slightly, your controllers are no longer fully secure and will pop off with minor force. Very irritating.